JP2000304884A - Clock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clock capable of digital display or analog display varying in design by using a liquid crystal display panel. SOLUTION: This clock has a liquid crystal display panel 10 provided within a clock case 20, for displaying at least one of time information and calendar information. The liquid crystal display panel 10 comprises a liquid crystal cell wherein a liquid crystal layer is sealed between a pair of transparent substrates respectively having electrodes on inner surfaces facing each other; an absorption type polarizing plate disposed on the visible side of the liquid crystal cell, absorbing linearly polarized light having an oscillation plane perpendicular to an easy-to-transmit axis; a reflection type polarizing plate disposed on the opposite side of the visible side of the liquid crystal cell, reflecting linearly polarized light having an oscillation plane perpendicular to the easy-to-transmit axis; and color filter disposed on the visible side of the absorption type polarizing plate or between the absorption type polarizing plate and the reflection type polarizing plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clock (watch and clock) for displaying at least one of time information such as hours, minutes, and seconds and calendar information such as dates, days, months, and years using a liquid crystal display panel. ). In addition to a clock that digitally displays time information and calendar information, the watch has a combination clock with an analog type that displays time information with hands, a dial on a dial with a liquid crystal display panel, an hour hand, a minute hand, It also includes an analog clock that simulates the display of hands such as the second hand.

[0002]

2. Description of the Related Art A clock using a liquid crystal display panel to digitally display time information such as hours, minutes, and seconds and calendar information such as date, day of the week, month, and year has conventionally been equipped with a crystal oscillator circuit. And is often used for table clocks. There is also a combination clock that combines an analog display in which time information is displayed with hands and a digital display in which time information and calendar information are displayed by numbers and characters. further,
Analog timepieces have also been proposed in which a dial is formed by a liquid crystal display panel to selectively display various scale patterns, or to simulate the display of hands such as an hour hand, a minute hand, and a second hand (for example, see Japanese Unexamined Patent Application Publication No. No. 54-153066).

In such a timepiece, a conventional liquid crystal display panel for displaying time information, calendar information, and the like,
A liquid crystal cell in which liquid crystal is sealed is sandwiched between two transparent substrates having electrodes on opposing inner surfaces, and an upper polarizing plate and a lower polarizing plate are arranged on both sides thereof. Then, when a voltage is applied between the electrodes of the pair of substrates of the liquid crystal cell to give an electric field,
The optical characteristics of the liquid crystal are changed, and a predetermined display is performed by partially controlling the transmission and absorption of light incident on the liquid crystal display panel.

The upper polarizing plate and the lower polarizing plate are both polarizing plates that absorb linearly polarized light having a vibration plane perpendicular to the axis of easy transmission. In such a timepiece using a conventional liquid crystal display panel, in a general normally white mode, time information and calendar information are displayed in black on a white background.

[0005]

However, simply displaying the time information and calendar information in black on a white background as described above does not change the design, lacks an interesting taste, and makes consumers tired. . For this reason, the consumption of digital display clocks has been declining in recent years. Also, combination clocks have not become very popular, and analog display clocks using liquid crystal display panels have not become widespread. The present invention has been made in view of such a situation, and an object of the present invention is to provide a timepiece capable of performing digital display or analog display with a design change using a liquid crystal display panel.

[0006]

According to the present invention, there is provided a timepiece having a liquid crystal display panel for displaying at least one of time information and calendar information, in order to achieve the above object, the liquid crystal display panel is provided as follows. Constitute. On the viewing side of a liquid crystal cell in which a liquid crystal layer is sealed between a pair of transparent substrates each having an electrode on the opposing inner surface, linearly polarized light having a vibration plane in a direction parallel to the easy transmission axis is transmitted to the viewing side of the liquid crystal cell. An absorption-type polarizing plate that absorbs linearly polarized light that has a vibration plane in the orthogonal direction is arranged.On the opposite side to the viewing side, linearly polarized light that has a vibration plane in the direction parallel to the easy transmission axis is transmitted, and the easy transmission axis is A reflection-type polarizing plate that reflects linearly polarized light having a vibrating surface in a direction perpendicular to the light is disposed. Further, a color filter is provided on the viewing side of the absorption type polarizing plate or between the absorption type polarizing plate and the reflection type polarizing plate.

It is preferable to dispose a light absorbing plate on the liquid crystal display panel on the side opposite to the viewing side of the reflective polarizing plate. Further, a light scattering plate may be provided on the viewing side of the absorption type polarizing plate. Alternatively, a backlight may be provided on the side opposite to the viewing side of the reflective polarizing plate. In a liquid crystal display panel provided with these backlights, a light scattering plate may be provided on the viewing side of the absorption type polarizing plate.

In each of the above liquid crystal display panels, the axis of easy transmission of the absorption type polarizing plate disposed on the viewing side of the liquid crystal cell and the major axis direction of the liquid crystal molecules on the viewing side of the liquid crystal layer of the liquid crystal cell are parallel to each other. It is desirable that the axis of easy transmission of the polarizing plate and the major axis direction of liquid crystal molecules on the side opposite to the viewing side in the liquid crystal layer of the liquid crystal cell be parallel or orthogonal.

Alternatively, the axis of easy transmission of the absorbing polarizer disposed on the viewing side of the liquid crystal cell and the major axis direction of liquid crystal molecules on the viewing side of the liquid crystal layer of the liquid crystal cell are orthogonal to each other to facilitate transmission of the reflective polarizing plate. The axis and the major axis direction of the liquid crystal molecules on the side opposite to the viewing side in the liquid crystal layer of the liquid crystal cell may be parallel or orthogonal. (These conditions are particularly necessary when a twisted nematic liquid crystal layer having a twist angle of 90 ° is used in a liquid crystal cell.)

The following may be used as the color filters of the liquid crystal display panel. 1) A selective transmission type color filter that transmits almost only light of a specific wavelength. 2) Linearly polarized light having a vibration plane perpendicular to the easy transmission axis transmits only light of a specific wavelength and absorbs light of other wavelengths. A color polarizing plate that transmits all linearly polarized light having a vibration plane parallel to the axis of easy transmission, 3) a dielectric multilayer film that reflects light of a specific wavelength among incident light and transmits light of other wavelengths,

As the liquid crystal layer of the above liquid crystal cell, any of a twisted nematic liquid crystal layer, a super twisted nematic liquid crystal layer, and a guest-host liquid crystal layer may be used. The color filter of the liquid crystal display panel, the viewing side of the absorption type polarizing plate, between the absorption type polarizing plate and the liquid crystal cell,
Alternatively, it may be provided between the liquid crystal cell and the reflective polarizing plate. Alternatively, the color filter may be provided between the liquid crystal layer and the transparent substrate constituting the liquid crystal cell.

In the timepiece according to the present invention, the incident light from the viewing side is linearly polarized by the absorption type polarizing plate, and the voltage is applied between the electrodes of the liquid crystal cell of the liquid crystal display panel and the portion where the voltage is not applied. When the polarized light passes through the liquid crystal cell, it becomes a twisted part and a non-twisted part,
When the light reaches the reflective polarizing plate, it is transmitted as linearly polarized light having a vibration plane parallel to the easy transmission axis, and is transmitted as a linearly polarized light having a vibration plane orthogonal to the easy transmission axis. It is reflected and returned to the viewing side.

In addition, since a color filter is provided in the path of the light, the light is colored. For this reason, the reflected portion becomes a brightly colored display state of metal tone or mirror tone, and the portion where the incident light has passed through the reflective polarizing plate is the underlying color (color of components inside the watch, light absorption). When a plate, semi-transmissive plate, or the like is installed, the color becomes black, white, or any other color), so that the time information and the calendar information can be displayed in bright colors by the contrast.

Therefore, it is possible to provide a digital display clock having a design change, and other various clocks using a liquid crystal display. In addition, if a light scattering plate is provided on the viewing side of the absorption type polarizing plate of the liquid crystal display panel, the specular reflection light by the reflection type polarizing plate is scattered, so that a colorized metal tone or mirror tone display is softened. The viewing angle can be widened as well as the color tone for easy viewing.

When a backlight is provided on the side opposite to the viewing side of the reflective polarizing plate, even in a dark environment such as at night, by turning on the backlight, half of the light incident on the reflective polarizing plate is transmitted therethrough. Then, the light becomes linearly polarized light and enters the liquid crystal cell. Depending on whether or not a voltage is applied between the electrodes of the liquid crystal cell, a portion where the linearly polarized light is twisted and a portion where the linearly polarized light is not twisted are formed. , Color information such as time information and calendar information can be clearly displayed.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a timepiece according to the present invention will be described below with reference to the drawings. A wristwatch embodying the present invention will first be described with reference to FIGS. 1 and 2 showing an example of the appearance of a digital display wristwatch embodying the present invention and its internal structure.

The watch case 20 of this wristwatch is formed by joining a windshield glass 22 and a back cover 23 to a metal body 21. The windshield 22 is made of a transparent material such as sapphire glass, tempered glass, or a resin material.
The body 21 is fitted to the front side of the body 21 by bonding or packing. The back cover 23 is fitted on the back side of the body 21 via screwing or packing.

As described above, the inside of the watch case 20 has an airtight structure so that dust and moisture do not enter.
A liquid crystal display panel (liquid crystal display) 10 is provided on the windshield 22 side of the watch case 20 as a display unit for displaying time and the like. This liquid crystal display panel 10 includes:
There are a time display section 10a for displaying hours, minutes, and seconds, a calendar display section 10b for displaying months, days, and days of the week, and a colon mark display section 10c that blinks every second.

Further, a normal time display function of 12 hours or 24 hours, a calendar display function of month, day and day, an alarm function, a stopwatch function, a timer function and the like can be displayed. The switching of the display function and the time correction are performed by operating a plurality of operation switches 24 provided on the body 21 of the watch case 20. The operation switch 24 is provided with a packing between the operation switch 24 and the body 21 so that dust and moisture do not enter the inside of the watch case 20.

This wristwatch is a quartz timepiece, in which a liquid crystal display panel 10 and a circuit board 30 are arranged substantially in parallel in a watch case 20 as shown in FIG. A battery 31 serving as a driving power source is disposed on the side. The oscillation frequency is 3 on the circuit board 30.
The crystal oscillator 32 of 2,768 Hz and the crystal oscillator 3
2 oscillates to generate a predetermined signal, a crystal oscillating circuit and a frequency dividing circuit, a driving circuit for driving the liquid crystal display panel 10, and a central processing unit (CP) for integrally controlling the clock.
U) etc. are mounted.

The liquid crystal display panel 10 and the circuit board 30
They are electrically connected by a zebra rubber 34 disposed therebetween. Then, the liquid crystal display panel 10 and the circuit board 3
The zebra rubber 34 is configured to be compressed in its thickness direction in order to ensure electrical connection with the zero.

The zebra rubber 34 is formed by forming conductive layers containing carbon or metal particles in silicon rubber, which is an insulator, at a constant pitch. The conductive layer is in an insulated state. The connection terminal patterns are formed on the opposing surfaces of the liquid crystal display panel 10 and the circuit board 30 at the same pitch so as to correspond to the vertical conductive portions and the insulating portions formed by the conductive layers of the zebra rubber 34 being alternately arranged. Are formed. The structure of the liquid crystal display panel 10 will be described in detail below.

[First Configuration Example of Liquid Crystal Display Panel]
A first configuration example of the liquid crystal display panel 10 used in the above-described timepiece according to the present invention will be described with reference to FIGS. In each of these figures, the thickness and interval of each component are greatly enlarged. FIG. 3 is a schematic cross-sectional view showing the configuration of the liquid crystal display panel 10, and FIG. 6 is a schematic cross-sectional view showing the configuration of the liquid crystal cell 12 with the intermediate portion cut away.

As shown in FIG. 3, the liquid crystal display panel 10 has a liquid crystal cell 12, an absorption polarizer 14 disposed on the viewing side (the upper side in the figure), and a side opposite to the viewing side of the liquid crystal cell 12 (as shown in FIG. 3). (The lower side in the figure) a reflection type polarizing plate 16 and a color filter 18 provided between the absorption type polarizing plate 14 and the liquid crystal cell 12.

As shown in FIG. 6, the liquid crystal cell 12 has a pair of substrates 1 and 2 made of a transparent insulating material such as glass and the like, and a sealing material 4 is provided around the pair of substrates 1 and 2, and the liquid crystal layer 3 is sealed in the gap. And hold it. Transparent electrodes 5 and 6 made of indium tin oxide (ITO) or the like are formed on opposing inner surfaces of the pair of substrates 1 and 2, respectively, and at least one of the electrodes is necessary for displaying time information and calendar information. (In the case of displaying numbers, it is generally a 7-segment pattern). The liquid crystal layer 3 is made of a twisted nematic (TN) liquid crystal having a twist angle of 90 degrees. The liquid crystal layer 3 of each of the substrates 1 and 2 and the electrodes 5 and 6
The liquid crystal molecules are subjected to an alignment treatment so that the liquid crystal molecules are aligned in a predetermined direction.

The absorbing polarizer 14 disposed on the viewing side of the liquid crystal layer 12 transmits linearly polarized light having a vibration plane in a direction parallel to the easy transmission axis, and transmits a linearly polarized light having a vibration plane in a direction perpendicular to the easy transmission axis. Polarized light is a sheet-like member that absorbs. The reflective polarizing plate 16 provided on the side opposite to the viewing side of the liquid crystal layer 12 transmits linearly polarized light having a vibration plane in a direction parallel to the easy transmission axis, and transmits a straight line having a vibration plane in a direction perpendicular to the easy transmission axis. Polarized light is a sheet-like member that reflects light. This reflective polarizing plate 1
For example, an optical film DBEF (trade name) sold by Sumitomo 3M Limited is used as 6.

The liquid crystal layer 3 is arranged so that the axis of easy transmission of the absorption polarizer 14 and the major axis of liquid crystal molecules on the viewing side in the liquid crystal layer 3 of the liquid crystal cell 12 are parallel to each other. Further, the axis of easy transmission of the reflective polarizing plate 16 and the liquid crystal layer 3 of the liquid crystal cell 12
The liquid crystal molecules are arranged so as to be parallel to the long axis direction of the liquid crystal molecules on the side opposite to the viewing side in the above. Therefore, the absorption type polarizer 14
Is easily orthogonal to the easy transmission axis of the reflective polarizer 16.

The directions of the stripes in the absorption polarizer 14 and the reflection polarizer 16 in FIG. 3 indicate the directions of the axes of easy transmission, and the horizontal stripes in the absorption polarizer 14 are parallel to the paper. The vertical stripes in the reflective polarizing plate 16 indicate the direction perpendicular to the paper surface. Absorption polarizing plate 14 and liquid crystal cell 12
Is a selective transmission type color filter (also referred to as an absorption type filter) that transmits substantially only light of a specific wavelength and absorbs light of other wavelengths. Therefore, the light transmitted through the color filter is colored into a specific color.

As the selective transmission type color filter, for example, a pigment-dispersed coating film in which a pigment is dispersed and mixed in an organic resin is used. Since this pigment-dispersed coating film can be formed by a coating method or a printing method, a new component is not required, and one surface of an existing component (in the example shown in FIG. 3, opposite to the viewing side of the absorbing polarizer 14). Side or the outside surface of the substrate 1 on the viewing side of the liquid crystal cell 12). Light incident on the pigment-dispersed coating film transmits only light of a specific wavelength, and absorbs light of other wavelengths.

The color filter 18 is not limited to the position shown in FIG. 3, but may be arranged anywhere on the viewing side of the reflective polarizing plate 16 constituting the liquid crystal display panel 10. Therefore, as shown in FIG.
4 may be disposed on the viewing side (outside), or may be disposed between the liquid crystal cell 12 and the reflective polarizer 16 as shown in FIG.

Alternatively, as shown in FIG. 7 or FIG. 8, the liquid crystal cell 12 is a liquid crystal cell 12CF having a built-in color filter, and as shown in FIG.
On both sides of the 2CF, an absorption polarizer 14 and a reflective polarizer 16
, The liquid crystal display panel 10 can be configured. In this case, as shown in FIG.
The color filter 18 may be formed by applying a pigment-dispersed coating film on the inner surface of the substrate 1 on the viewing side of the liquid crystal, or the pigment may be formed on the inner surface of the substrate 2 on the side opposite to the viewing side of the liquid crystal cell 12CF as shown in FIG. The color filter 18 may be formed by applying a dispersed coating film. Then, a transparent electrode 5 or 6 is formed on the surface of each color filter 18 in contact with the liquid crystal layer 3. However, the color filter 1 is formed on the entire surface of the substrate 1 on which the electrode 5 is formed and in contact with the liquid crystal layer 3 or on the entire surface of the substrate 2 on which the electrode 6 is formed and in contact with the liquid crystal layer 3.
8 may be formed.

Next, the principle of color display by the liquid crystal display panel 10 shown in FIG. 3 will be described with reference to FIGS. In these figures, the horizontal stripes in the absorption polarizer 14 and the vertical stripes in the reflection polarizer 16 indicate that the axes of easy transmission are parallel to the paper surface and perpendicular to the paper surface, respectively, as described with reference to FIG. The long solid line with an arrow at the tip shows the light ray, the short solid line with an arrow at both ends shows the direction of the plane of oscillation of linearly polarized light after passing through each component, and the horizontal direction is parallel to the paper plane, the vertical direction The direction is perpendicular to the paper.

The liquid crystal layer 3 of the liquid crystal cell 12 is made of TN liquid crystal having a twist angle of 90 degrees as described above. The color filter 18 is a selective transmission type color filter that transmits only yellow light and absorbs light other than yellow light. FIG. 10 shows a background portion where no voltage is applied between the electrodes 5 and 6 of the liquid crystal cell 12 (referred to as an OFF state). In this portion, the vibration plane of the linearly polarized light transmitted through the liquid crystal cell 12 Twist (phase modulation) is performed by 90 degrees by the twist function of FIG.

FIG. 11 shows a display portion such as a character in which a voltage is applied between the electrodes 5 and 6 of the liquid crystal cell 12 (referred to as an ON state). In this portion, the liquid crystal layer 3 of the liquid crystal cell 12 has liquid crystal molecules. And the twist function is lost, and the incident linearly polarized light is transmitted as it is without the direction of the vibration plane being twisted (phase modulated). Of the light incident on the liquid crystal display panel 10 from the viewing side (upper side in the figure), half is absorbed by the absorbing polarizer 14 and the other half is transmitted through the absorbing polarizer 14 in a direction parallel to the paper. The light enters the color filter 18 as linearly polarized light having a vibrating surface. However, all the light other than yellow is absorbed by the color filter 18 regardless of the state of the liquid crystal cell 12. The yellow light passes through the color filter 18 and enters the liquid crystal cell 12.

Then, the liquid crystal cell 12 has the OF shown in FIG.
In the F state, the direction of the vibrating plane of the yellow linearly polarized light is twisted 90 degrees while transmitting through the liquid crystal cell 12, and enters the reflective polarizing plate 16 in a direction perpendicular to the paper surface.
Therefore, the direction of the vibrating surface of the yellow linearly polarized light is the same as the direction of the easy transmission axis of the reflective polarizing plate 16,
The light passes through the reflective polarizing plate 16 and the background (color of components inside the timepiece when it is mounted on the timepiece) appears dark from the viewing side.

On the other hand, when the liquid crystal cell 12 is in the ON state shown in FIG. 11, the yellow linearly polarized light passes through the liquid crystal cell 12 without being twisted, and the direction of the vibrating surface remains parallel to the paper. The light enters the reflective polarizing plate 16. Therefore,
The direction of the vibration plane of the yellow linearly polarized light is
6 because it is orthogonal to the direction of the easy transmission axis,
6 is specularly reflected. Since the reflected light is emitted to the viewing side through a path reverse to that at the time of incidence, it looks bright in a yellow metallic tone. It looks like putting a yellow filter on a mirror.

Therefore, if a voltage is applied between the electrodes of the liquid crystal cell 12 only in the portion of the character for displaying the time information and calendar information, the character is displayed in a yellow metallic tone (close to gold) in a dark background through which the inside can be seen. It will be displayed brightly. As described above, in the timepiece according to the present invention, in the area where the time information and calendar information are digitally displayed, almost all of the light that has entered the liquid crystal display panel 10 and has been colored is reflected, and the brightly colored metal The key can be displayed.

On the other hand, in the background of the area to be digitally displayed,
Since the light incident on the liquid crystal display panel 10 passes through the reflective polarizer 16, the light on the opposite side of the reflective polarizer 16 from the viewing side is projected. Thereby, as a whole, the digital display becomes a display in which the digital display is raised in a metallic tone. If the easy axis of the reflective polarizer 16 and the long axis of the liquid crystal molecules on the side opposite to the viewing side of the liquid crystal layer 3 are arranged orthogonal to each other, the easy axis of the absorptive polarizer 14 and the reflective polarizer are arranged. Since the axis of easy transmission of the plate 16 is parallel to the above-described example, the display state is reversed, and characters and the like can be displayed in a yellow metallic background in a state where the inside can be seen through.

If a color filter 18 having a different transmission color is used, an arbitrary metallic display color or background color can be obtained. Therefore, according to the present invention, it is possible to provide a timepiece having a change in design and an interesting taste as compared with a conventional timepiece which digitally displays time information and calendar information in black display on a white background. In addition, such a liquid crystal display panel is a liquid crystal display panel of a dot matrix display, or a large number of pointer patterns are formed by shifting the angle little by little, and the hands such as an hour hand, a minute hand, and a second hand are displayed in a pseudo-graphical manner. It is also possible to compose an analog display type timepiece.

In addition, only the calendar information is digitally displayed, and the time information is displayed in an analog manner by the hands. Only the time information is displayed, and the display for various functions such as an alarm and a stopwatch is added. It is of course possible to do so. As shown in FIG. 4, FIG. 5, FIG. 7 to FIG. 9, even in a liquid crystal display panel in which the color filters 18 are respectively located at different positions, the position at which light incident on the liquid crystal display panel is colored by the color filters 18 is shown. However, the color display function described above is the same except for the above.

The example in which the liquid crystal layer 3 sealed in the liquid crystal cell 12 is a twisted nematic (TN) liquid crystal having a twist angle of 90 degrees has been described, but a TN liquid crystal having a twist angle of less than 90 degrees or a twist angle of 180 degrees is used. Super to 270 degrees
It is also possible to use a twisted nematic (STN) liquid crystal, a guest-host liquid crystal, or the like. When a super twisted nematic liquid crystal is used, the sharpness of the liquid crystal layer can be improved, and the contrast can be increased.

When the liquid crystal layer 3 has a function of phase-modulating the linearly polarized light transmitted therethrough and twisting the direction of the vibrating plane, the absorption type polarizing plate 14 and the reflective type polarizing plate 16 disposed on both sides of the liquid crystal cell 12 are provided. Are arranged so as to be parallel to each other or to intersect at the same angle as the twist angle thereof (orthogonal if the twist angle is 90 degrees). The guest-host liquid crystal is a solute in the liquid crystal as a solvent.
It is a mixed liquid crystal in which a coloring dye is dissolved. When the orientation state of the liquid crystal molecules is changed by the electric field, the orientation of the dichroic dye can be controlled according to the movement of the liquid crystal molecules, and the display can be performed by modulating the absorption of light incident from a certain direction.

If the guest host liquid crystal is sealed in the liquid crystal cell 12 of the liquid crystal display panel 10, time information such as hour, minute and second of a clock and calendar information such as date, day of the week, month and year can be digitally obtained. The display area or the area where the hands are pseudo-displayed in an analog manner can be displayed in a metallic color display state, and the background can be colored. Here, by selecting the specific wavelength transmitted through the color filter 18 and the absorption wavelength of the dichroic dye dissolved in the guest-host liquid crystal, respectively, the combination of the color of the area for displaying characters and the like and the background area is selected. Can be configured freely.

In the above description, an example in which a selective transmission type color filter is used as the color filter 18 has been described.
A dielectric multilayer film may be used. The dielectric multilayer film is formed by laminating a plurality of dielectric materials having different refractive indices, and reflects light of a specific wavelength among incident light and transmits light of other wavelengths.

Therefore, when the color filter 18 made of a dielectric multilayer film is disposed on the viewing side of the absorption type polarizing plate 14,
Of the light incident on the liquid crystal display panel, only light of a specific wavelength is reflected by the color filter 18 of the dielectric multilayer film, and light other than the specific wavelength is incident on the absorbing polarizer 14. Linearly polarized light parallel to the easy transmission axis of the absorption polarizer 14 enters the liquid crystal cell 12. Then, in the background part of the display, the linearly polarized light other than the specific wavelength is phase-modulated by 90 degrees in the liquid crystal cell 12 and also transmitted through the reflective polarizer 16.

On the other hand, since a voltage is applied between the electrodes of the liquid crystal cell 12 in the display section for characters and the like, linearly polarized light of a wavelength other than a specific wavelength passes through the liquid crystal cell 12 without being phase-modulated and is reflected by the reflective polarizing plate. The light is specularly reflected at 16 and returned to the viewing side. Therefore, in the area where time information, calendar information, and the like are displayed, almost all of the incident light is reflected, resulting in a bright metal tone display. On the other hand, in the background portion of the display, only the light of a specific wavelength is reflected by the color filter 18 of the dielectric multilayer film, so that the background is colored, and a bright metal tone display can be performed therein.

When a dielectric multilayer film is used,
There is almost no light loss. The specific wavelength to be reflected is
It can be set freely by changing the combination of the refractive indexes of the dielectric layers. Further, the color filter 18
Although a color polarizing plate can be used as an example, an embodiment thereof will be described later in detail. In addition, a reflective color filter that transmits only light of a specific wavelength and reflects light of other wavelengths, a fluorescent filter having a function of performing wavelength conversion of incident light, and the like can be used.

[Second configuration example of liquid crystal display panel]
A second configuration example of the liquid crystal display panel used in the timepiece according to the present invention will be described with reference to FIG. FIG. 12 is a schematic sectional view showing the configuration of the liquid crystal display panel.
3 to 11 are denoted by the same reference numerals, and description thereof will be omitted.

In the structure of this liquid crystal display panel, FIG.
The only difference from the above is that the light absorbing plate 13 is disposed on the opposite side (the lower side in the figure) of the reflective polarizing plate 16 from the viewing side. As the light absorption plate 13, a black light absorption film, an absorption type polarizing plate, an absorption type color filter, or the like is used. When an absorption-type polarizing plate is used, the absorption-type polarizing plate is arranged so that its easy-to-transmit axis is orthogonal to the easy-to-transmit axis of the reflective polarizing plate 16. When the light absorbing plate 13 is arranged on the side opposite to the viewing side of the reflective polarizing plate 16, light transmitted through the reflective polarizing plate 16 can be absorbed by the light absorbing plate 13,
The background portion for displaying time information, calendar information, and the like can be set to a black or dark display state, and characters and the like can be clearly displayed in a metal tone in which colors are displayed.

Therefore, the display contrast is improved. Even when the inverted display is performed, the time information, calendar information, and the like can be displayed in black or near-color characters with good contrast in a bright metal tone background. The other functions and the application of the various modifications are the same as those in the first configuration example, and a description thereof will be omitted.

[Third Configuration Example of Liquid Crystal Display Panel]
A third configuration example of the liquid crystal display panel used in the timepiece according to the present invention will be described with reference to FIG. FIG. 13 is a schematic sectional view showing the structure of the liquid crystal display panel.
3 to 11 are denoted by the same reference numerals, and description thereof will be omitted.

In the structure of this liquid crystal display panel, FIG.
The only difference from the above is that the light scattering plate 15 is disposed on the viewing side (the upper side in the figure) of the absorption type polarizing plate 14. The light scattering plate 15 is formed by applying a mixture of silica particles, acryl beads, and calcium powder, which are silicon oxide, in an adhesive on a film-like substrate. When this light scattering plate 15 is provided on the viewing side of the absorption type polarizing plate 14,
Light that is specularly reflected from the reflective polarizing plate 16 and exits to the viewing side can be irregularly reflected by the light scattering plate 15. As a result, a colorized strong metal tone for displaying time information, calendar information and the like can be made softer to make it easier to see, and the viewing angle can be increased.

The example in which the light scattering plate 15 is arranged on the viewing side of the absorption type polarizing plate 14 has been described. However, between the absorption type polarizing plate 14 and the liquid crystal cell 12 or between the liquid crystal cell 12 and the reflection type polarizing plate 16. The light scattering plate 15 may be provided. The other functions and the application of the various modifications are the same as those in the first configuration example, and a description thereof will be omitted.

[Fourth Configuration Example of Liquid Crystal Display Panel]
A fourth configuration example of the liquid crystal display panel used in the timepiece according to the present invention will be described with reference to FIG. FIG. 14 is a schematic sectional view showing the configuration of the liquid crystal display panel.
3 to 13 are denoted by the same reference numerals, and description thereof will be omitted.

In the configuration of this liquid crystal display panel, FIG.
The difference from the above is that the light absorbing plate 13 is provided on the opposite side of the reflective polarizing plate 16 from the viewing side, and the absorbing polarizing plate 14 is provided.
The only difference is that the light-scattering plate 15 is provided on the viewing side. This configuration corresponds to the light absorbing plate 13 of the liquid crystal display panel shown in FIG.
And the light scattering plate 15 of the liquid crystal display panel shown in FIG. 13, so that both actions and effects can be obtained.

That is, the contrast between the background portion displaying the time information and the calendar information and the character portion can be enhanced, and the colorized metal tone of the display can be made softer to make it easier to see and the viewing angle can be increased. it can. The other functions and the application of the various modifications are the same as those in the first configuration example, and a description thereof will be omitted.

[Fifth Configuration Example of Liquid Crystal Display Panel]
A fifth configuration example of the liquid crystal display panel used in the timepiece according to the present invention will be described with reference to FIG. FIG. 15 is a schematic sectional view showing the structure of the liquid crystal display panel.
3 to 11 are denoted by the same reference numerals, and description thereof will be omitted. The configuration of this liquid crystal display panel is different from that shown in FIG. 3 only in that a backlight 17 is provided on the opposite side (the lower side in the figure) of the reflective polarizing plate 16 from the viewing side.

The backlight 17 uses a light source such as an electroluminescent device, a light emitting diode (LED) array, or a cold cathode tube or a hot cathode tube. When the backlight 17 is arranged on the side opposite to the viewing side of the reflective polarizing plate 16, half of the light that enters the reflective polarizing plate 16 from the backlight 17 is transmitted and becomes linearly polarized and enters the liquid crystal cell 12. . In the background part for displaying time information, calendar information, etc.,
When the linearly polarized light passes through the liquid crystal cell 12, it is phase-modulated by 90 degrees, colorized by transmitting only light of a specific wavelength through the color filter 18, transmitted through the absorption polarizer 14, and emitted to the viewer side.

Since a voltage is applied between the electrodes of the liquid crystal cell 12 in a portion such as a character for displaying time information, calendar information, or the like, linearly polarized light due to the backlight incident on the liquid crystal cell 12 is changed by the liquid crystal layer 3. Since the light is transmitted without being phase-modulated, its vibration surface is orthogonal to the axis of easy transmission of the absorption polarizer 14 and is absorbed by the absorption polarizer 14. Therefore, by turning on the backlight 17 even in a dark place where there is little or no external light, it is possible to display time information, calendar information, and the like in black or dark colors in a bright background portion formed by colored transmitted light. .

The backlight 17 is turned on by operating one of the operation switches 24 of the timepiece shown in FIG. 1 as necessary. When the backlight 17 is not turned on, the display such as the time information and the calendar information remains in a colorized metal tone. The other functions and the application of the various modifications are the same as those in the first configuration example, and a description thereof will be omitted.

[Sixth Configuration Example of Liquid Crystal Display Panel]
A sixth configuration example of the liquid crystal display panel used in the timepiece according to the present invention will be described with reference to FIG. FIG. 16 is a schematic sectional view showing the configuration of the liquid crystal display panel.
3 to 15 are denoted by the same reference numerals, and description thereof will be omitted. The configuration of this liquid crystal display panel is different from that shown in FIG. 15 in that a transflective plate 19 is provided between the reflective polarizing plate 16 and the backlight 17.
It is only the point that was arranged.

In this example, an absorption-type polarizing plate is used as the semi-transmissive plate 19, and the axis of easy transmission is set to the reflective-type polarizing plate 16.
Were arranged so that the angle formed by the easy transmission axis was 75 degrees.
The semi-transmissive plate 1 between the reflective polarizing plate 16 and the backlight 17
9, when the backlight 17 is not turned on, half of the light transmitted through the reflective polarizing plate 16 is transmitted to the semi-transmitting plate 1.
9, the display of the background portion is darkened, and the display contrast of time information, calendar information, and the like can be increased.

On the other hand, when the backlight 17 is turned on due to a small amount of ambient light, the background transmitted by the light transmitted through the semi-transmissive plate 19 can be brightened, and characters such as time information and calendar information can be displayed. Can be a black and dark display. Therefore, the contrast of the display can be increased regardless of whether the backlight 17 is turned on or not. Other functions and application of various modified examples are the same as those of the first configuration example and the fifth configuration example, and thus description thereof is omitted.

[Seventh Configuration Example of Liquid Crystal Display Panel]
A seventh configuration example of the liquid crystal display panel used in the timepiece according to the present invention will be described with reference to FIG. FIG. 17 is a schematic sectional view showing the structure of the liquid crystal display panel.
3 to 15 are denoted by the same reference numerals, and description thereof will be omitted. The configuration of this liquid crystal display panel is different from that shown in FIG. 15 only in that a light scattering plate 15 is provided on the viewing side of the absorption type polarizing plate 14.

When the light scattering plate 15 is provided on the viewing side of the absorption type polarizing plate 14, light that is specularly reflected by the absorption type polarizing plate 14 and emitted to the viewing side can be irregularly reflected by the light scattering plate 15. In addition, it is possible to make the color of a metal tone such as a character for displaying time information and calendar information a soft tone to make it easier to see and to widen the viewing angle. Other functions and application of various modified examples are the same as those of the first configuration example and the fifth configuration example, and thus description thereof is omitted.

[Eighth Configuration Example of Liquid Crystal Display Panel]
An eighth configuration example of the liquid crystal display panel used in the timepiece according to the present invention will be described with reference to FIG. FIG. 18 is a schematic sectional view showing the structure of the liquid crystal display panel.
3 to 17 are denoted by the same reference numerals, and description thereof will be omitted. The configuration of this liquid crystal display panel is different from that shown in FIG. 16 only in that a light scattering plate 15 is provided on the viewing side of the absorption type polarizing plate 14.

When the light scattering plate 15 is provided on the viewing side of the absorption type polarizing plate 14, light that is specularly reflected by the absorption type polarizing plate 14 and emitted to the viewing side can be irregularly reflected by the light scattering plate 15. In addition, it is possible to make the color of a metal tone such as a character for displaying time information and calendar information a soft tone to make it easier to see and to widen the viewing angle. Other functions and application of various modified examples are the same as in the case of the first configuration example and the sixth configuration example, and thus description thereof will be omitted.

[Ninth Configuration Example of Liquid Crystal Display Panel]
A ninth configuration example of the liquid crystal display panel used in the timepiece according to the present invention will be described with reference to FIGS. FIGS. 19 and 20 are schematic cross-sectional views for explaining the configuration of the liquid crystal display panel and the principle of color display. The same parts as those in FIGS. 3 to 12 are denoted by the same reference numerals. , And the description thereof will be omitted. The directions of the stripes in each polarizing plate in FIGS. 19 and 20 and the meaning of the solid line with each arrow are also the same as those described with reference to FIGS.

In the structure of this liquid crystal display panel, FIG.
2 only in that a color polarizer 28 is disposed between the absorption polarizer 14 and the liquid crystal cell 12 instead of the selective transmission color filter 18 as a color filter. is there. The color polarizing plate 28 transmits only light of a specific wavelength and absorbs light of other wavelengths among linearly polarized light having a vibration plane orthogonal to the easy transmission axis. The linearly polarized light having a vibration plane parallel to the easy transmission axis has a property of transmitting both light having the specific wavelength and light having the other wavelength.

Here, the color polarizing plate 28 is arranged such that its easy axis of transmission is orthogonal to the easy axis of absorption type polarizing plate 14. In this embodiment, the absorption polarizer 14, the color polarizer 28, and the liquid crystal cell 12 are arranged in this order. Therefore, since the light transmitted through the absorption polarizer 14 is linearly polarized light having a vibration plane orthogonal to the easy transmission axis of the color polarizer 28, only light of a specific wavelength transmits through the color polarizer 28. Light of other wavelengths transmitted through the absorption polarizer 14 is
Absorb at 8. In the illustrated example, the specific wavelength is the wavelength of yellow light.

FIG. 19 shows the path of light other than yellow light among the light incident on the liquid crystal display panel from the viewing side.
0 indicates a yellow light path. The left half of these figures shows an OFF state where no voltage is applied between the electrodes of the liquid crystal cell 12, and the right half shows an ON state where a voltage is applied between the electrodes of the liquid crystal cell 12, respectively. .

Light other than yellow light incident on the liquid crystal display panel from the viewing side is absorbed by the absorption type polarizing plate 14 as shown in FIG.
, And becomes linearly polarized light having a vibration plane parallel to the axis of easy transmission (parallel to the paper), and is incident on the color polarizer 28.
Since the direction of the vibrating plane is orthogonal to the direction of the axis of easy transmission of the color polarizing plate 28, all the light is absorbed by the color polarizing plate 28.

Therefore, the liquid crystal cell 12 is turned on and off.
It does not contribute to the display regardless of the state. The yellow light incident on the liquid crystal display panel from the viewing side is, as shown in FIG.
The light passes through the absorption polarizer 14 and becomes linearly polarized light having a vibration plane parallel to the axis of easy transmission, and enters the color polarizer 28 in the same manner as non-yellow light.
Even if the direction of the vibrating surface is orthogonal to the direction of the easy axis of transmission of the color polarizing plate 28, the light can pass through the color polarizing plate 28, and thus enters the liquid crystal cell 12 as it is.

In the background portion where the liquid crystal cell 12 is in the OFF state, the yellow linearly polarized light incident on the liquid crystal cell 12 is phase-modulated by 90 degrees when passing through the liquid crystal cell 12, and the direction of the vibration plane is reflected. Since the direction is parallel to the axis of easy transmission of the mold polarizing plate 16 (perpendicular to the plane of the paper), the light is transmitted therethrough and absorbed by the light absorbing plate 13 disposed on the rear side. Therefore, from the viewing side, it looks black or dark.

On the other hand, in the display section for characters and the like in which the liquid crystal cell 12 is turned on, the yellow linearly polarized light incident on the liquid crystal cell 12 passes through the liquid crystal cell 12 without being phase-modulated and is reflected by the reflection type polarizing plate. Light is incident on the light source 16. Therefore, the yellow linearly polarized light is mirror-reflected by the reflective polarizing plate 16 and exits to the viewing side through the reverse path, since the direction of the vibrating surface is perpendicular to the easy axis of transmission of the reflective polarizing plate 16. . Therefore, in a region such as a character displaying time information, calendar information, or the like, almost all of the yellow light incident on the liquid crystal cell 12 is reflected. ) Is displayed in the metal tone.

For this reason, a clock using this liquid crystal display panel also has a change in design and an interesting taste as compared with a conventional clock in which time information and calendar information are digitally displayed in black on a white background. Become. By selecting a specific wavelength that passes through the color polarizing plate 28, that is, a color of light, a metal tone display can be performed in various different colors.

[Tenth Configuration Example of Liquid Crystal Display Panel] Next, a tenth configuration example of the liquid crystal display panel used in the timepiece according to the present invention will be described with reference to FIGS. 21 and 22. FIGS. 21 and 22 are schematic cross-sectional views for explaining the configuration of the liquid crystal display panel and the principle of color display, and the same parts as those in FIGS. 3 to 12 are denoted by the same reference numerals. , And the description thereof will be omitted. The direction of the stripes in each polarizing plate in FIGS. 21 and 22 and the meaning of the solid line with each arrow are also the same as those described with reference to FIGS.

In the configuration of the liquid crystal display panel, FIG.
9 and FIG. 20 only in that a color polarizer 28 as a color filter is disposed between the liquid crystal cell 12 and the reflective polarizer 16. This color polarizing plate 28
Also, among linearly polarized light having a vibration plane orthogonal to the easy transmission axis, only light of a specific wavelength (yellow in this example) is transmitted, and light of other wavelengths (light other than yellow) is absorbed.

As shown in FIG. 21 and FIG. 22, all light incident on the liquid crystal display panel from the viewing side is transmitted through the absorbing polarizer 14 and vibrated parallel to the axis of easy transmission (parallel to the paper). And enters the liquid crystal cell 12 as linearly polarized light having When the light passes through the liquid crystal cell 12, the liquid crystal cell 12 is phase-modulated by 90 degrees in the left half of the OFF state, and the direction of the vibrating surface is linearly polarized in a direction parallel to the easy transmission axis of the color polarizer 28. And enters the color polarizing plate 28.

Therefore, in the background portion where the liquid crystal cell 12 is in the OFF state, both the non-yellow light and the yellow light pass through the color polarizing plate 28 as shown in FIGS. The reflective polarizer 16 disposed parallel to the easy axis of the plate 28 is also transmitted therethrough and absorbed by the light absorbing plate 13.

In the display area for characters and the like in which the liquid crystal cell 12 is in the ON state, the light other than yellow is emitted from the color polarizing plate 2 as shown in FIG.
Absorbed by 8. The yellow light passes through the color polarizer 28 and enters the reflective polarizer 16. Since the direction of the vibrating surface is orthogonal to the axis of easy transmission of the reflective polarizer 16, the yellow light is mirrored by the reflective polarizer 16. The light is reflected and exits to the viewing side through the reverse path. Therefore, almost all of the colorized light that enters the liquid crystal cell 12 is reflected and emitted to the viewer side. Therefore, even when this liquid crystal panel display is used for a clock, time information, calendar information, and the like can be displayed in a black or dark background in a brightly colored metal tone.

For this reason, a clock using this liquid crystal display panel has a change in design and an interesting taste as compared with a conventional clock in which time information and calendar information are digitally displayed in black on a white background. Become. By selecting a specific wavelength, that is, the color of light, that passes through all of the color polarizing plates 28, it is possible to perform metal-tone display with various different colors.

In the above-described ninth and tenth configuration examples, similarly to the color filter 18 described in the first configuration example, this color polarizing plate 28 is connected to the viewing side of the absorption type polarizing plate 14 or the liquid crystal. It may be provided on the inner surface side of any of the substrates in the cell 12. Further, various modifications other than the color filter 18 described in the first configuration example can be similarly applied to the ninth and tenth configuration examples described above.

[0084]

As is clear from the above description, the timepiece according to the present invention displays the time information and calendar information in a bright metallic color tone on a dark background, and vice versa. Can be displayed in a black or dark color within a metallic background that has been colored into a color, and the display color can be arbitrarily selected.

Therefore, in comparison with a conventional timepiece which digitally displays time information and calendar information in black on a white background,
A variety of design changes are possible, and it is possible to provide a watch with an interesting taste. In addition, the present invention can be applied to a watch with a backlight that can be used even in a dark environment with little or no external light.

Further, the present invention is not limited to a clock which digitally displays time information and calendar information by numerals and the like. The above-mentioned liquid crystal display panel may be a liquid crystal display panel of a dot matrix display, or a large number of pointer patterns may be shifted little by little. It is also possible to form an analog display type timepiece that displays the hands of the hour hand, minute hand, second hand, and the like in a simulated manner.

Further, only the calendar information is digitally displayed, and the time information is displayed in an analog manner by the hands. Only the time information is displayed, and the display for various functions such as an alarm and a stopwatch is added. It is of course possible to do so.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of the appearance of a digital display type wristwatch embodying the present invention.

FIG. 2 is a sectional view showing the internal structure of the digital display type wristwatch shown in FIG.

FIG. 3 is a schematic sectional view showing a first configuration example of a liquid crystal display panel used in a timepiece according to the present invention.

FIG. 4 is a schematic sectional view showing a modification of the liquid crystal display panel used in the timepiece according to the present invention.

FIG. 5 is a schematic sectional view showing another modification of the liquid crystal display panel used for the timepiece according to the present invention.

FIG. 6 is a schematic cross-sectional view showing the configuration of the liquid crystal cell in FIG.

FIG. 7 is a cross-sectional view similar to FIG. 6, illustrating a different example of a liquid crystal cell provided with a color filter.

FIG. 8 is a cross-sectional view similar to FIG. 6, showing still another example of a liquid crystal cell provided with a color filter.

FIG. 9 is a schematic cross-sectional view showing a configuration of a liquid crystal display panel using the liquid crystal cell shown in FIG. 7 or FIG.

10 is an explanatory diagram for explaining the principle of color display by the liquid crystal display panel shown in FIG.

11 is an explanatory diagram for explaining the principle of color display by the liquid crystal display panel shown in FIG.

FIG. 12 is a schematic sectional view showing a second configuration example of the liquid crystal display panel used for the timepiece according to the present invention.

FIG. 13 is a schematic sectional view showing a third configuration example of the liquid crystal display panel used for the timepiece according to the present invention.

FIG. 14 is a schematic sectional view showing a fourth configuration example of the liquid crystal display panel used for the timepiece according to the present invention.

FIG. 15 is a schematic sectional view showing a fifth configuration example of the liquid crystal display panel used in the timepiece according to the present invention.

FIG. 16 is a schematic sectional view showing a sixth configuration example of the liquid crystal display panel used for the timepiece according to the present invention.

FIG. 17 is a schematic sectional view showing a seventh configuration example of a liquid crystal display panel used for a timepiece according to the present invention.

FIG. 18 is a schematic sectional view showing an eighth configuration example of the liquid crystal display panel used for the timepiece according to the present invention.

FIG. 19 is an explanatory diagram for explaining a ninth configuration example of a liquid crystal display panel used for a timepiece according to the present invention and the principle of color display thereby.

FIG. 20 is an explanatory diagram for explaining a ninth configuration example of the liquid crystal display panel used in the timepiece according to the present invention and the principle of color display thereby.

FIG. 21 is an explanatory diagram for explaining a tenth configuration example of a liquid crystal display panel used for a timepiece according to the present invention and the principle of color display thereby.

FIG. 22 is an explanatory diagram for explaining a tenth configuration example of a liquid crystal display panel used for a timepiece according to the present invention and the principle of color display thereby.

[Explanation of symbols]

 1, 2: substrate 3: liquid crystal layer 5, 6: electrode 10: liquid crystal display panel 10a: time display section 10b: calendar display section 10c: mark display section 12, 12CF: liquid crystal cell 13: light absorbing plate 14: absorption type polarized light Plate 15: Light scattering plate 16: Reflective polarizing plate 17: Backlight 18: Color filter 20: Watch case 21: Body 22: Windshield 23: Back cover 28: Color polarizing plate 30: Circuit board

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09F 9/00 313 G09F 9/00 313 362 362 (72) Inventor Takashi Akiyama Ojishita-ji, Tokorozawa-shi, Saitama 840 Takeno Citizen Watch Co., Ltd.Technical Research Laboratory (72) Inventor Kintaka Sekiguchi Ojiro Tokorozawa-shi, Saitama Prefecture 840 Takeno, Shimotomi Citizen Watch Co., Ltd. (72) Inventor Koji Nakagawa Koji Tonozawa, Tokorozawa-shi, Saitama Prefecture 840 Citizen Watch Co., Ltd.

Claims (15)

[Claims] 1. A timepiece having a liquid crystal display panel for displaying at least one of time information and calendar information, wherein the liquid crystal display panel has a liquid crystal between a pair of transparent substrates each having an electrode on an opposing inner surface. Linear polarized light with a vibrating surface in the direction parallel to the easy transmission axis, which is transmitted on the liquid crystal cell enclosing the layer and on the viewing side of the liquid crystal cell, and having a vibration surface in the direction perpendicular to the easy transmission axis Is an absorbing polarizer that absorbs, and linearly polarized light having a vibration plane in a direction parallel to the easy transmission axis, which is disposed on the side opposite to the viewing side of the liquid crystal cell, transmits the vibration plane in a direction perpendicular to the easy transmission axis. And a color filter disposed on the viewing side of the absorption-type polarizing plate or between the absorption-type polarization plate and the reflection-type polarization plate. Clock to do. 2. The timepiece according to claim 1, wherein a light absorbing plate is provided on the liquid crystal display panel on a side opposite to a viewing side of the reflective polarizing plate. 3. The timepiece according to claim 1, wherein a light scattering plate is provided on the liquid crystal display panel on a viewing side of the absorption type polarizing plate. 4. The timepiece according to claim 1, wherein a light scattering plate is disposed on the liquid crystal display panel on the viewing side of the absorption type polarizing plate, and light is absorbed on a side opposite to the viewing side of the reflection type polarizing plate. A watch characterized by a plate. 5. The timepiece according to claim 1, wherein a backlight is provided on the liquid crystal display panel on a side opposite to a viewing side of the reflective polarizing plate. 6. The timepiece according to claim 1, wherein a light scattering plate is provided on the liquid crystal display panel on a viewing side of the absorption type polarizing plate, and a backlight is provided on a side opposite to the viewing side of the reflection type polarizing plate. A clock characterized by the arrangement of 7. The timepiece according to claim 1, wherein an easy-transmission axis of an absorption polarizer disposed on a viewing side of the liquid crystal cell and a viewing axis of a liquid crystal layer of the liquid crystal cell. The major axis direction of the liquid crystal molecules was made parallel, and the axis of easy transmission of the reflective polarizing plate was parallel or orthogonal to the major axis direction of the liquid crystal molecules on the side opposite to the viewing side in the liquid crystal layer of the liquid crystal cell. clock. 8. The timepiece according to claim 1, wherein an easy-transmission axis of an absorption polarizer disposed on a viewing side of the liquid crystal cell and a viewing axis of a liquid crystal layer of the liquid crystal cell. The major axis direction of the liquid crystal molecules is orthogonal to the axis of easy transmission of the reflective polarizer, and the major axis direction of the liquid crystal molecules on the side opposite to the viewing side in the liquid crystal layer of the liquid crystal cell is parallel or orthogonal. clock. 9. The timepiece according to claim 1, wherein the color filter of the liquid crystal display panel is a selective transmission type color filter that transmits substantially only light of a specific wavelength. 10. The timepiece according to claim 1, wherein the color filter of the liquid crystal display panel transmits only light of a specific wavelength as linearly polarized light having a vibration plane orthogonal to an easy transmission axis. The watch is a color polarizer that absorbs light of other wavelengths and transmits all linearly polarized light having a vibration plane parallel to the easy transmission axis. 11. The timepiece according to claim 1, wherein the color filter of the liquid crystal display panel reflects light of a specific wavelength among incident light, and transmits light of another wavelength. Watch that is a dielectric multilayer film. 12. The liquid crystal layer of the liquid crystal cell is made of one of a twisted nematic liquid crystal, a super twisted nematic liquid crystal, and a guest-host liquid crystal.
The timepiece according to any one of the preceding claims. 13. The color filter of the liquid crystal display panel,
The timepiece according to claim 1, wherein the timepiece is provided between the absorption polarizer and the liquid crystal cell. 14. A color filter of the liquid crystal display panel,
The timepiece according to any one of claims 1 to 12, wherein the timepiece is provided between the liquid crystal cell and the reflective polarizing plate. 15. The color filter of the liquid crystal display panel,
The timepiece according to any one of claims 1 to 12, wherein the timepiece is provided between the transparent substrate and the liquid crystal layer constituting the liquid crystal cell.